實(shí)心盤轉(zhuǎn)動慣量：J=mR²
具有的初始轉(zhuǎn)動動能 轉(zhuǎn)化為 阻力矩做功：1/2Jω²=Tθ
轉(zhuǎn)動圈數(shù)：n=θ/(2π)
代入：m=4.98,R=0.03,ω=11000,T=2.03
解得：
J=0.004482
θ=133577.
n=21259.4
如果原題有單位且不統(tǒng)一,則先統(tǒng)一后再代入算.
A centrifuge rotor rotating at 11000 is shut off and is eventually brought uniformly to rest by a frictional torque of 2
A centrifuge rotor rotating at 11000 is shut off and is eventually brought uniformly to rest by a frictional torque of 2.03 .If the mass of the rotor is 4.98 and it can be approximated as a solid cylinder of radius 0.0300 ,through how many revolutions will the rotor turn before coming to rest?
英語人氣：270 ℃時(shí)間：2020-05-14 13:34:46
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